SEISMICITY of the CRIMEAN-BLACK SEA REGION in 2020

In 2020, the monitoring of the seismic situation in the Crimean-Black Sea region was carried out by a network of nine digital seismic stations located on the Crimean Peninsula. The catalog includes infor mation on 88 events with energy classes Kп=4.4–11.3. An updated map of the energy representativeness Kmin of earthquakes with an increased area within the isolines Kmin=7–8 is presented. The restored observations at the Kerch station increased the sensitivity of the network in the eastern part of the region. The existing network of stations provides without gaps the registration of earthquakes with a magnitude of M≥4.0, and for the main seismic zones: Sevastopol, Yalta, Alushta, Sudak, Kerch Peninsula – with a magnitude of M≥3.0. On the basis of the information obtained, a catalog of earthquakes with the main kinematic and dynamic parameters was compiled, an analysis was carried out and the features of seismicity of individual regions of the region were indicated. A detailed description of the seismic situation in various districts of the region is given. The period under consid eration is characterized by moderate seismic activity in the region, which is below the long-term average. The greatest activation of seismic processes was observed in 2020 in the Kerch-Anapa and Northwestern areas. In the Kerch-Anapa area, two tangible earthquakes with a maximum observed intensity of I=4–5 occurred in five settle ments on the coast of the Caucasus. An earthquake of the maximum energy class Kп=11.3, moment magnitude Mw=4.03 was realized on March 15, at 05h36m. The released seismic energy in the Northwestern area in 2020 significantly exceeded the 10-year average. Solutions of focal mechanisms were obtained for the 2 strongest earth quakes.